Perhaps you should try some spelling variations:
theo thuoc » che thuoc, tao thuoc, thu thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
thanh long » thanh cong, thang long, thanh huong
long quang » luong quang, cong quang, hong quang
hanh cong » thanh cong, hang cong, nhanh chong
hanh dong » anh dong, ha dong
can chan » dan chan, cam chan, ban chan
chan cau » phan cau, can cau, chinh cau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo thuoc sach - thanh long quang ((hanh cong) or (hanh dong)) can chan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo thuoc sach - thanh long quang ((hanh cong) OR (hanh dong)) can chan cau.
• Adding a wildcard symbol may retrieve word variants: theo thuoc sach - thanh long quang ((hanh cong) or (hanh dong)) can chan cau*.